<pre><code># this should not be a heading

print "hi"
</code></pre>

<p>```</p>

<h1>first comment</h1>

<p>a = 1</p>

<h1>second comment</h1>

<p>b = 2
```</p>

<pre><code>void foo() {

    x = 1;
</code></pre>
